17 Spray-on insulation for use in spraying insulation to the underside of a roof or to the outside of the roof or structure; Spray-on insulation for use in encapsulating the structure with insulation applied to the exterior of the structure; Spray-on insulation for use in spraying insulation to the underside of the roof and/or roof ceiling of a structure; Spray-on insulation for use in the interior encapsulation of a structure with insulation or spray insulation; Polyurethane spray foam for encapsulating the structure with foam applied to the exterior of the structure; Polyurethane spray foam for spraying foam to the underside of a roof or to the outside of the roof or structure; Polyurethane spray foam for spraying foam to the underside of the roof and/or roof ceiling of a structure; Polyurethane spray foam for the interior encapsulation of a structure with foam or spray foam